<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<style>
    #dale,
    #dyq,
    p.man{
        font-size: 30px;
        background-color: yellow;
        width: 500px;
    }
</style>
<body>
    <div>
        <p id="dale">我是dale</p>
        <p class="chinese man">我是小戴</p>
        <p id="dyq">我是dyq</p>
    </div>
</body>
</html>